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The current epidemic of the barley pathogen Ramularia collo-cygni derives from a population expansion and shows global admixture

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dc.contributor.authorStam, Remco
dc.contributor.authorHeß, Michael
dc.contributor.authorSghyer, Hind
dc.contributor.authorTellier, Aurélien
dc.date.accessioned2024-06-16T14:27:18Z
dc.date.available2024-06-16T14:27:18Z
dc.date.issued2019
dc.description.abstractRamularia leaf spot is becoming an ever-increasing problem in main barley-growing regions since the 1980s, causing up to 70% yield loss in extreme cases. Yet, the causal agent Ramularia collo-cygni remains poorly studied. The diversity of the pathogen in the field thus far remains unknown. Furthermore, it is unknown to what extent the pathogen has a sexual reproductive cycle. The teleomorph of R. collo-cygni has not been observed. To study the genetic diversity of R. collo-cygni and get more insights in its biology, we sequenced the genomes of 19 R. collo-cygni isolates from multiple geographic locations and diverse hosts. Nucleotide polymorphism analyses of all isolates shows that R. collo-cygni is genetically diverse worldwide, with little geographic or host specific differentiation. Next, we used two different methods to detect signals of recombination in our sample set. Both methods find putative recombination events, which indicate that sexual reproduction happens or has happened in the global R. collo-cygni population. Lastly, we used these data on recombination to perform historic population size analyses. These suggest that the effective population size of R. collo-cygni decreased during the domestication of barley and subsequently grew with the rise of agriculture. Our findings deepen our understanding of R. collo-cygni biology and can help us to understand the current epidemic. We discuss how our findings support possible global spread through seed transfer, and we highlight how recombination, clonal spreading, and lack of host specificity could amplify global epidemics of this increasingly important disease and suggest specific approaches to combat the pathogen. © 2019 The American Phytopathological Societyen
dc.format.extent1 Onlineressource (Pages 2161-2168)
dc.format.mediumonline resource
dc.identifier.doihttps://doi.org/10.60810/openumwelt-1431
dc.identifier.urihttps://openumwelt.de/handle/123456789/4648
dc.language.isoeng
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleThe current epidemic of the barley pathogen Ramularia collo-cygni derives from a population expansion and shows global admixture
dc.title.alternativeThe current epidemic of the barley pathogen Ramularia collo-cygni derives from a population expansion and shows global admixture
dc.typeWissenschaftlicher Artikel
dc.type.dcmitext
dc.type.mediumcomputer
dspace.entity.typePublication
local.bibliographicCitation.journalTitlePhytopathology / American Phytopathological Society
local.bibliographicCitation.originalDOI10.1094/PHYTO-04-19-0117-R
local.bibliographicCitation.volume109 (2019), Heft 12
local.collectionAufsätze
local.contributor.authorId(DE-588)1099176913
local.contributor.authorId02183845
local.contributor.authorId02183833
local.contributor.authorId02183846
local.identifier.catalogId02472820
local.ingest.leader05336naa a2200000uu 4500
local.jointTitleTHE CURRENT EPIDEMIC OF THE BARLEY PATHOGEN RAMULARIA COLLOCYGNI DERIVES FROM A POPULATION EXPANSION AND SHOWS GLOBAL ADMIXTURE
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